Search Results

1 - 10 of 20 items :

  • "flower head" x
Clear All


This paper reports the results of observations of the abundance of population Succisa pratensis Moench, as well as temporal and spatial variabilities of chosen traits such as the number of rosettes, number of leaves per rosette, number and height of flowering stems, number of flower heads per generative stem and number of seeds per fruit. Investigations were conducted in the years 2009−2013, in six patches of Molinietum caeruleae with different dominant species, unmanaged from 10 to 22 years. On the basis of studies performed, the state of populations and chances for maintenance in the colonised site were evaluated.

Four species of the genus Idiomacromerus Crawford, 1914 are recorded from Israel as reared from flower heads of Centaurea spp. (Asteraceae). Two of them, Idiomacromerus artusis Zerova, sp. n. and I. persimilis Zerova, sp. n. are described

. Ч. 2. Robineau-Desvoidy J. B. Essai sur les Myodaires // Mёmoires prёsentёs par divers savants, Academie Royale des Sciences, Institut de France, Classe des Sciences Mathematiques et Physique. - 1830. - 2. - 813 p. Seguy E. 28. Dipteres (Brachyceres) (Muscidae Acalypterae et Scatophagidae) // Faune de France. - Paris, 1934. - 28. - IV + 832 p. Sobhian R., Zwolfer H. Phytophagous insect species associated with flower heads of yellow starthistle (Centaurea solstitialis L.) // Zeitschrift fur Angewandte Entomologie. - 1985. - 99. - P. 301-321. Vasilkovskaja O


A species, previously known from a short description based on the holotype lost in the bombing of Hamburg before description, T. kogardtauica Hering, 1944, was collected recently in great numbers in the Middle East, from Iran to Kyrgyzstan; it is redescribed, and the neotype is designated. Th e flies were found to infest flower heads of Inula stenocalathia (Rech. f.) Soldano, I. peacockiana (Aitch. & Hemsl.) Korovin, and I. grandis Schrenk ex Fisch. & C. A. Mey.


This study was conducted to investigate the effect of various horticultural substrates (compost, peat-coconut, peat TS1, flower soil, lowmoor peat) and a foliar spray of chlormequat (at a concentration of 1380 mg dm-3) on the growth and flowering of the marigold cultivars belonging to two species: Tagetes erecta - ʻMarvel Mixtureʼ and ʻTaishan Orangeʼ, and Tagetes patula - ʻDurango Redʼ and ʻBonanza Flameʼ. The obtained results show that the plants grown in peat TS1 and peat-coconut were taller, had longer internodes and leaves, and thicker stems than the plants grown in the other substrates. Chlormequat significantly reduced the height of ʻMarvel Mixtureʼ (in peat TS1), ʻTaishan Orangeʼ (in lowmoor peat) and ‘Bonanza Flameʼ (in peat-coconut). The use of chlormequat also accelerated the development of flower heads in ʻTaishan Orangeʼ (in lowmoor peat).


Knautia sarajevensis is an endemic plant of the Dinaric Alps and is mainly distributed on Bosnian Mountains. Due to the quite large flower heads and easy maintenance, this plant has a potential use as a substitute ornamental plant for K. arvensis in perennial beds. The current study evaluated the germination process in different treatments in an attempt to suppress dormancy and increase germination rate, and to develop a successful protocol for micropropagation. An over 60% germination rate was achieved through cultivation of seeds on MS basal medium with reduced mineral nutrient composition and the absence of sucrose. On the other hand, a below 10% germination rate was achieved with untreated seeds. Suppression of apical dominance was achieved through application of high concentrations of kinetin, apical shoot decapitation or cultivation of shoots in liquid media. Overall, liquid cultures were more successful as a micropropagation system for this plant. Shoots spontaneously developed roots on multiplication treatments and were successfully acclimatized. Moreover, phenolic compound profile was analysed in the light of the possible medicinal potential of this plant. Variable amounts of total phenolic compounds as well as individual phenolics were recorded, according to treatment and solidification of media. An increase in rosmarinic acid content was reported for kinetin treatments and acclimatized plants comparing to mother plants in natural habitat. The present study shows that choice of cytokinin concentration, explant type as well as culture type influences not only shoot proliferation and apical dominance suppression but also in vitro production of phenolics.

Tephritis tridentata S. Korneyev and Mohamadzade Namin, sp. n. reared from the flower heads of Jurinea baissunensis Iljin in South-Eastern Kazakhstan, Western Turkmenistan and Southern Iran is described. It is similar to T. bardanae Schrank, T. dilacerata Loew, T. formosa Loew, T. kovalevi V. Korneyev et Kameneva, T. valida Loew and T. zernyi Hering in the widely brown wing pattern with two dark spots at apices of veins R4+5 and M (instead of apical fork) and three spots (two large hyaline and one small yellowish ) in cell r1, differing from all known species by having three brown bar-like crossbands in the posterior half of the wing (diffusely spotted in compared species)


The aim of this work was to develop a red clover variety adapted to agro-climatic conditions of Latvia, suitable for different requirements of forage producers, resistant to most widespread diseases and producing high seed yield annually. Medium late ripening diploid red clover variety ‘Jancis’ was created at the LLU Research Institute of Agriculture in long-term work carried out since 1985. After free pollination of best samples of red clover collections from the VIR (St. Petersburg), individual and family selection among hybrids were carried out for approximately 20 years. Finally, best breeding line Nr. 43047 was registered as a variety ‘Jancis’. The variety is characterised by good winter hardiness, high dry matter yield (10-12 t·ha-1) and good persistence in the sward - up to 3-4 years. The variety is characterised by a long stem (90-110 cm) with 8-9 internodes, dark green leaves with a distinctive brighter picture, medium length and width of medial leaflet, and bright pink flower heads. ‘Jancis’ has stable annual seed yield in the conditions of Latvia; under favourable conditions reaching 500- 600 kg·ha-1 seeds. Since 2010, the variety ‘Jancis’ has been included in the common Latvian and EU Plant Variety Catalogue.

Industr Hyg Toxicol 2009; 60(4):485-501. doi: 4. Seidler-Łożykowska K. Effect of the selected weather conditions on essential oil, α -bisabolol and chamazulene content in flower heads of chamomile ( Chamomilla recutita (L.) Rausch.). J Ess Oil Res 2010; 22 (1): 45-48. 5. Letchamo W. Developmental and seasonal variations in flavonoids of diploid and tetraploid chamomile ligulate florets. J Plant Physiol 1996; 148(6):645-651. doi: 6. Šalamon I. Effect on the internal and

. Berimavandi AR, Hashemabadi D, Ghaziani MVF, Kaviani B. Effects of plant density and sowing date on the growth, flowering and quantity of essential oil of Calendula officinalis L. J Med Plants Res 2011; 20: 5110-5115. 11. Rumińska A. Rośliny lecznicze. Podstawy biologii i agrotechniki. Warszawa1983. 12. Król B. Yield and the chemical composition of flower heads of pot marigold (Calendula officinalis L. cv. Orange King) depending on nitrogen fertilization. Acta Sciarum Polonorum, Hortorum Cultus 2011; 10(2):235-243. 13. Król B. The effect of different nitrogen fertilization